A couple of weeks ago I was attending a wedding at Stoke Newington Town Hall - as we were not immediate family we were requested to go to the rear of the building to get to the balcony of the main hall where the wedding was to take place. While we were waiting for the back door to be unlocked I took the opportunity to photograph the entrance to the bunker beneath the building, now used as a CCTV and ' emergency planning' centre. For more information see this from Subterranea Britannica, my own Subterranean City and Iain Sinclair's Hackney, That Rose Red Empire. Oh, and I also took some pictures of the wedding.
Author of Subterranean City, Beneath the Streets of London, London's Coffee Houses, Decadent London, The Folklore of London, Subterranean City (Revised and Expanded Edition), Netherwood, Last Resort of Aleister Crowley, Lord of Strange Deaths, the Fiendish World of Sax Rohmer; Secret Tunnels in England, Folklore and Fact